package com.lijy.awt;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Menus extends JPanel {

    static final Boolean
            bT = new Boolean(true),
            bF = new Boolean(false);

    // Dummy class to create type identifiers:
    static class MType {
        MType(int i) {
        }
    }

    static final MType
            mi = new MType(1), // Normal menu item
            cb = new MType(2), // Checkbox menu item
            rb = new MType(3); // Radio button menu item
    JTextField t = new JTextField(10);
    JLabel l = new JLabel("Icon Selected", Faces.faces[0], JLabel.CENTER);
    ActionListener a1 = new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            t.setText(((JMenuItem) e.getSource()).getText());
        }
    };
    ActionListener a2 = new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            JMenuItem mi = (JMenuItem) e.getSource();
            l.setText(mi.getText());
            l.setIcon(mi.getIcon());
        }
    };
    // Store menu data as "resources":
    public Object[][] fileMenu = {
            // Menu name and accelerator:
            {"File", new Character('F')},
            // Name type accel listener enabled
            {"New", mi, new Character('N'), a1, bT},
            {"Open", mi, new Character('O'), a1, bT},
            {"Save", mi, new Character('S'), a1, bF},
            {"Save As", mi, new Character('A'), a1, bF},
            {null}, // Separator
            {"Exit", mi, new Character('x'), a1, bT},
    };
    public Object[][] editMenu = {
            // Menu name:
            {"Edit", new Character('E')},
            // Name type accel listener enabled
            {"Cut", mi, new Character('t'), a1, bT},
            {"Copy", mi, new Character('C'), a1, bT},
            {"Paste", mi, new Character('P'), a1, bT},
            {null}, // Separator
            {"Select All", mi, new Character('l'), a1, bT},
    };
    public Object[][] helpMenu = {
            // Menu name:
            {"Help", new Character('H')},
            // Name type accel listener enabled
            {"Index", mi, new Character('I'), a1, bT},
            {"Using help", mi, new Character('U'), a1, bT},
            {null}, // Separator
            {"About", mi, new Character('t'), a1, bT},
    };
    public Object[][] optionMenu = {
            // Menu name:
            {"Options", new Character('O')},
            // Name type accel listener enabled
            {"Option 1", cb, new Character('1'), a1, bT},
            {"Option 2", cb, new Character('2'), a1, bT},
    };
    public Object[][] faceMenu = {
            // Menu name:
            {"Faces", new Character('a')},
            // Optinal last element is icon
            {"Face 0", rb, new Character('0'), a2, bT,
                    Faces.faces[0]},
            {"Face 1", rb, new Character('1'), a2, bT,
                    Faces.faces[1]},
            {"Face 2", rb, new Character('2'), a2, bT,
                    Faces.faces[2]},
            {"Face 3", rb, new Character('3'), a2, bT,
                    Faces.faces[3]},
            {"Face 4", rb, new Character('4'), a2, bT,
                    Faces.faces[4]},
    };
    public Object[] menuBar = {
            fileMenu, editMenu, faceMenu,
            optionMenu, helpMenu,
    };

    static public JMenuBar
    createMenuBar(Object[] menuBarData) {
        JMenuBar menuBar = new JMenuBar();
        for (int i = 0; i < menuBarData.length; i++)
            menuBar.add(
                    createMenu((Object[][]) menuBarData[i]));
        return menuBar;
    }

    static ButtonGroup bgroup;

    static public JMenu
    createMenu(Object[][] menuData) {
        JMenu menu = new JMenu();
        menu.setText((String) menuData[0][0]);
        menu.setMnemonic(
                ((Character) menuData[0][1]).charValue());
        // Create redundantly, in case there are
        // any radio buttons:
        bgroup = new ButtonGroup();
        for (int i = 1; i < menuData.length; i++) {
            if (menuData[i][0] == null)
                menu.add(new JSeparator());
            else
                menu.add(createMenuItem(menuData[i]));
        }
        return menu;
    }

    static public JMenuItem
    createMenuItem(Object[] data) {
        JMenuItem m = null;
        MType type = (MType) data[1];
        if (type == mi)
            m = new JMenuItem();
        else if (type == cb)
            m = new JCheckBoxMenuItem();
        else if (type == rb) {
            m = new JRadioButtonMenuItem();
            bgroup.add(m);
        }
        m.setText((String) data[0]);
        m.setMnemonic(
                ((Character) data[2]).charValue());
        m.addActionListener(
                (ActionListener) data[3]);
        m.setEnabled(
                ((Boolean) data[4]).booleanValue());
        if (data.length == 6)
            m.setIcon((Icon) data[5]);
        return m;
    }

    Menus() {
        setLayout(new BorderLayout());
        add(createMenuBar(menuBar),
                BorderLayout.NORTH);
        JPanel p = new JPanel();
        p.setLayout(new BorderLayout());
        p.add(t, BorderLayout.NORTH);
        p.add(l, BorderLayout.CENTER);
        add(p, BorderLayout.CENTER);
    }

    public static void main(String args[]) {
        Show.inFrame(new Menus(), 300, 200);
    }
}
